1821184132 has 12 divisors (see below), whose sum is σ = 3187576476. Its totient is φ = 910448000.

The previous prime is 1821184129. The next prime is 1821184147. The reversal of 1821184132 is 2314811281.

It can be written as a sum of positive squares in 2 ways, for example, as 1311598656 + 509585476 = 36216^2 + 22574^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1821184094 and 1821184103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4513 + ... + 60520.

It is an arithmetic number, because the mean of its divisors is an integer number (265631373).

Almost surely, 2^1821184132 is an apocalyptic number.

It is an amenable number.

1821184132 is a deficient number, since it is larger than the sum of its proper divisors (1366392344).

1821184132 is a wasteful number, since it uses less digits than its factorization.

1821184132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72038 (or 72036 counting only the distinct ones).

The product of its digits is 3072, while the sum is 31.

The square root of 1821184132 is about 42675.3339998646. Note that the first 3 decimals coincide. The cubic root of 1821184132 is about 1221.1938801214.

The spelling of 1821184132 in words is "one billion, eight hundred twenty-one million, one hundred eighty-four thousand, one hundred thirty-two".